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| Northwest Africa 6554 | |||||||||||||||||||
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| Basic information | Name: Northwest Africa 6554 This is an OFFICIAL meteorite name. Abbreviation: NWA 6554 Observed fall: No Year found: 2010 Country: Morocco Mass:  138 g | ||||||||||||||||||
| Classification history: |
This is 1 of 336 approved meteorites classified as Lunar (feldsp. breccia). [show all] Search for other: Lunar meteorites | ||||||||||||||||||
| Comments: | Approved 28 Apr 2011 | ||||||||||||||||||
| Writeup |
Writeup from MB 99:
Northwest Africa 6554 (NWA 6554) Morocco Found: 2010 Classification: Lunar meteorite (feldspathic breccia) History: A 113 g stone (NWA 6252), a 138 g stone (NWA 6554) and a 29.72 g stone (NWA 6555), all partially crusted and minimally weathered, were purchased in Morocco by A. Aaronson in 2010. These stone are from the same locality as NWA 2995 and its pairings. Petrography: (T. Bunch and J. Wittke, NAU): Same general description as given for NWA 2995 and 6252. A feldspathic breccia that contains anorthositic, noritic, gabbros, olivine basalts, troctolites, granulitic breccias, and KREEPy-like lithologies. Breccia-in-breccia structures, impact melts and veins are common. Moderately to heavily shocked, weathering grade is low. Geochemistry: Anorthosite plagioclase An92.4-95.6; troctolite olivine, Fa32.2 (FeO/MnO = 96); olivine fragment, Fa36.6 (FeO/MnO = 89). Chemistry (R. Korotev, WUSL): Na2O = 0.44 wt% and FeO = 11.3 wt% and trace elements (ppm) Sc = 20, Sm = 4.11, Eu = 0.97, Th = 1.38. Classification: Achondrite (Lunar, feldspathic breccia). Paired with NWA 2995. Specimens: 20.7 g is on deposit at NAU. An anonymous collector holds the main mass. | ||||||||||||||||||
| Data from: MB99 Table 0 Line 0: |
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| Institutions and collections |
NAU: Geology, Bldg 12
Knoles Dr
Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012) WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011) Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, No. 99, April 2012, MAPS 47, E1-E52 (2012) [published online only]
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Geography:
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Statistics: This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) | ||||||||||||||||||
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| Revision history: |
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